Great maintenance visit today. Today we inspected the unit in heating mode. Quick check of the outdoor condenser. Both compressor and outdoor fan motor capacitors as well as contactor are testing well within range at this time. I did notice large amount of dirt accumulation on outdoor fan motor shaft. Previously customer has been advised of the necessity of a new outdoor fan motor. Customer also will be provided with recommendation for replacing that. Outdoor unit was washed down for the condenser coils. Next, we moved up into the attic to check the furnace. Initial inspection of that shows heavy water damage along the drain pans. Pictures will be attached to checkout form. While conducting a test on the furnace, we observe the high limit switch going bad. I’ve been tracing it. We were able to confirm that the high limit and switch was not getting power causing the unit to only run for short sporadic time frames. Customer was advised. Customer let us know that he rarely runs the furnac